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Frontiers of Environmental Science & Engineering

Front.Environ.Sci.Eng.    2008, Vol. 2 Issue (1) : 103-108
Degradation of chlorinated phenols by nanoscale zero-valent iron
CHENG Rong1, WANG Jianlong1, ZHANG Weixian2
1.Institute of Nuclear and New Energy Technology, Tsinghua University; 2.Department of Civil and Environmental Engineering, Lehigh University
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Abstract Chlorophenols (CPs), as important contaminants in groundwater, are toxic and difficult to biodegrade. Recently nanoscale zero-valent iron received a great deal of attention because of its excellent performance in treating recalcitrant compounds. In this study, nanoscale zero-valent iron particles were prepared using chemical reduction, and the reductive transformations of three kinds of chlorinated phenols (2-CP, 3-CP, and 4-CP) by nanoscale zero-valent iron under different conditions were investigated. The transformation process of the CPs was shown to be dechlorination first, then cleavage of the benzene ring. The removal efficiency of the CPs varied as follows: 2-CP > 3-CP > 4-CP. The reactivity of CPs was associated with their energy of lowest unoccupied molecular orbit (ELUMO). With the increase in initial concentrations of CPs, removal efficiency decreased a little. But the quantities of CPs reduced increased evidently. Temperature had influence on not only the removal efficiency, but also the transformation pathway. At higher temperatures, dechlorination occurred prior to benzene ring cleavage. At lower temperatures, however, the oxidation product was formed more easily.
Issue Date: 05 March 2008
 Cite this article:   
CHENG Rong,WANG Jianlong,ZHANG Weixian. Degradation of chlorinated phenols by nanoscale zero-valent iron[J]. Front.Environ.Sci.Eng., 2008, 2(1): 103-108.
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WANG Jianlong
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1 Chetty R Christensen P A Golding B T et al.Fundamental and applied studies on the electrochemicalhydrodehalogenation of halogenated phenols at a palladised titaniumelectrodeAppl. Catal. A-Gen. 2004 271(1–2)185194
2 Vallecillo A Garcia-Encina P A Pena M Anaerobic biodegradability and toxicity of chlorophenolsWater Sci.Technol. 1999 40(8)161168
3 Wang J L MicrobialImmobilization Techniques and Water Pollution ControlBeijingScience Press 2002 (in Chinese)
4 Wang J L Qian Y Microbial degradation of 4-chlorophenolby microorganisms entrapped in carrageenan-chitosan gelsChemosphere 1999 38(13)31093114
5 Wang J L Qian Y Horan N et al.Bioadsorption of pentachlorophenol (PCP) from aqueoussolution by activated sludge biomassBioresour.Technol. 2000 75(2)157161
6 Ahmed S Kemp T J Unwin P R Photomineralisation kinetics of aqueous chlorophenols ata supported TiO2 surface studied by the channel-flowmethod with electrochemical detection. J. PhotochemPhotobiol. A-Chem. 2001 141(1)6978
7 Pi Y Z Wang J L The mechanism and pathway ofthe ozonation of 4-chlorophenol in aqueous solutionSci. China Ser. B-Chem. 2006 49(4)379384
8 Hu J Wang J L Chen R Degradation of 4-chlorophenol in aqueous solution by γ-radiationand ozone oxidationSci. China Ser. B-Chem. 2006 49(2)186192
9 Agrawal A Tratnyek P G Reduction of nitro aromaticcompounds by zero-valent iron metal EnvironSci. Technol. 1996 30(1)153160
10 Gu B Liang L Dickey M J et al.Reductive precipitation of uranium(VI) by zero-valentironEnviron. Sci. Technol. 1998 32(21)33663373
11 Blowes D W Ptacek C J Jambor J L In-situ remediation of Cr(VI)-contaminated groundwater usingpermeable reactive walls: Laboratory studiesEnviron. Sci. Technol. 1997 31(12)33483357
12 Qui S R Lai H F Roberson M J et al.Removal of contaminants from aqueous solution byreaction with iron surfacesLangmuir 2000 16(5)22302236
13 Gu B Phelps T J Liang L et al.Biogeochemical dynamics in zero-valent iron columns:Implications for permeable reactive barriersEnviron. Sci. Technol. 1999 33(13)21702177
14 Liang L Y Korte N Gu B H et al.Geochemical and microbial reactions affecting thelong-term performance of in situ “iron barriers”Adv. Environ. Res. 2000 4(4)273286
15 Wang C B Zhang W X Synthesizing nanoscale ironparticles for rapid and complete dechlorination of TCE and PCBsEnviron. Sci. Technol. 1997 31(7)21542156
16 Choe S Lee S H Chang Y Y et al.Rapid reductive destruction of hazardous organiccompounds by nanoscale Fe0Chemosphere 2001 42(4)367372
17 Schrick B Hydutsky B W Blough J L et al.Delivery vehicles for zerovalent metal nanoparticlesin soil and groundwaterChemistry of Materials 2004 16(11)21872193
18 Song H Carraway E R Reduction of chlorinated ethanesby nanosized zero-valent iron: Kinetics, pathways, and effects ofreaction conditionsEnviron. Sci. Technol. 2005 39(16)62376245
19 Phenrat T Salen N Sirk K et al.Aggregation and sedimentation of aqueous nanoscalezerovalent iron dispersionsEnviron. Sci.Technol. 2007 41(1)284290
20 Lien H L Zhang W X Transformation of chlorinatedmethanes by nanoscale iron particlesJ.Environ. Eng. ASCE 1999 125(11)10421047
21 Lien H L Zhang W X Nanoscale iron particles forcomplete reduction of chlorinated ethenesColloid. Surface A 2001 119(1–2)97105
22 Elliott D W Zhang W X Field assessment of nanoscalebiometallic particles for groundwater treatmentEnviron. Sci. Technol. 2001 35(24)49224926
23 Fukui K Yonezawa T Shingu H A molecular orbital theory of reactivity in aromatic hydrocarbonsJ. Chem. Phys. 1952 20(4)722725
24 Fukui K Yonezawa T Nagata C et al.Molecular orbital theory of orientation in aromatic,heteroaromatic, and other conjugated moleculesJ. Chem. Phys. 1954 22(8)14331442
25 Liu G S Song X F Yu J G et al.Quantitative structure-activity relationships ofsubstituted chloro-phenols' toxicity for microtoxJournal of Jiangxi Normal University 2001 25(4)313316(in Chinese)
26 Qu F P Zhang X J He M et al.Quantitative structure-biodegradability for chlorinatedaromatic cimpoundsEnvironmental Science 1998 19(6)2628(in Chinese)
27 Wang L S, ed.Organic Pollution ChemistryBeijingHigherEducation Press 2004 (in Chinese)
28 Xu X H Wei J J Wang D H Studies on dechlorination of chlorophenols with Pd/Fe andnanoscale Pd/FeChina Environmental Science 2004 24(1)7680(in Chinese)
29 Cheng L Z Zhang Y H Physical Chemistry. 2nd ed.ShanghaiShanghaiTechnology Press 1998 (in Chinese)
30 Deng B Burris D R Campbell T J Reductive of vinyl chloride in metallic iron-water systemsEnviron. Sci. Technol. 1999 33(15)26512656
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